A match is played by two teams, with each permitted no more than 11 people regarding the field at anybody time, one of who is a goalkeeper. A match may well not begin if either team has under seven players.
Various Other Suits
In national ‘A’ suits, an advisor might use a maximum of six substitutes.
Various other matches, particularly friendlies, more than six substitutes can be used provided that the contending groups get to an agreement on an optimum number therefore the referee is informed. If these requirements aren't satisfied, a maximum of six tend to be allowed. The names regarding the substitutes must certanly be provided to the referee before a match, otherwise they truly are unable to get involved.
Whenever a group would like to make a substitution, they must inform the referee. The alternative must just enter the area of play when the player he is replacing has left and after a signal from referee.
The alternative can only just enter from the halfway range and during a stoppage in play. The player who goes down usually takes no more part within the match. If a substitute or substituted player enters the field of play without authorization, he will probably be cautioned for unsporting behavior.